JPS584352A - Work holder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a workpiece holding device according to the preamble of claim 1.

The well-known device for this food (German Patent Publication No. 2903622
In the method of honing a workpiece, the workpiece holder is attached via a plate in a state where it floats beside the axis of the tool. In order to receive the torque exerted by the honing tool,
The workpiece holder has an arm on the plate that acts as a lever. This arm protrudes with a slight clearance between two stop rollers rotatably mounted on the base of the device, and the bearing is fixed on the base plate of the device.

However, by applying the torque in the above-described manner, it is not possible to obtain an absolutely free floating movement of the workpiece, since the stop device interferes with the floating movement of the workpiece.

The torque exerted on the workpiece by the Hojung tool is
It is considered to be a couple consisting of two forces of equal magnitude. In the equilibrium state, a force couple of the same magnitude is acting in the opposite direction to the above-mentioned couple, causing the workpiece to be machined to be displaced from its intended position. As a result, the workpiece assumes an inclined position,
This results in defects in the cylindrical shape of the workpiece bore.

The object of the invention is to design a device of this kind in such a way that the generated torque can be accommodated without any interference with the free floating movement of the workpiece.

This object is achieved according to the invention by the characteristic features of claim 1.

According to the above configuration, the torque acting on the workpiece support is transmitted to the portion via the stop device, and when the torque is applied to that portion, it becomes K. However, what receives this torque is a holding portion that generates a reaction force of the same magnitude but in the opposite direction. As a result, the force receiving part and the workpiece support are held in a torsion-free state, so that the workpiece to be machined cannot shift or assume an inclined position.

Other features of the invention will become apparent from the other claims, the description and the drawings.

Next, the present invention will be explained in more detail using the drawings of one embodiment.

The apparatus shown in FIGS. 1 and 2 has a substantially rectangular plate-like workpiece support. This workpiece support l is mounted in a floating, movable state and receives a workpiece, for example a gear 2, whose boring part 3 is to be machined with a Hojung tool 4. .

As illustrated and explained in detail in DE 29 03 622 A1, the workpiece support of FIG. A pair of bearings, one of which is guided immovably in the axial direction between the pedestals, while the other is free to move within predetermined limits in the lateral planar circle. Its limits are determined by the play that the two mutually opposing projections of plate l have inside the groove-shaped recess of the spacer.

In order to keep the power consumption for the transverse movement of the workpiece 2 as small as possible, the bearing is formed between the workpiece holder and the stand, and the workpiece holder is formed between the plate l and the bearing is between the stand and the workpiece holder. It is designed in such a way that a hydrostatic thin film is formed between the contact surfaces and only liquid friction with a low coefficient of friction occurs. For this purpose, the bearing is provided with a hole (not shown) through which pressure oil can be fed. One of these perforations is
It extends parallel to the axis of the spindle and emerges from a transverse bore. This transverse drilling extends through the attached bearing table and workpiece plate and terminates in the base plate 12. The transverse borehole is also connected to the pressure oil tank via a connection.

The workpiece support plate l and the bearing base have on their upper side an annular groove extending concentrically to the transverse bore, so that the four toroidal bearing surfaces are Limited by the upper and lower sides of the board.

For oil drainage, a further perforation is provided which emerges from the annular hole and extends axially and leads to a transverse perforation in the base plate 12.

The transverse borehole is connected by a conduit to the oil tank via a connection.

A continuous arm 5, which acts as a lever, is fixed to the plate 1 of the workpiece support in order to prevent twisting. This continuous arm 5 is
The workpiece support is located outside the plate and cooperates with a stop device 6 which is constructed according to the invention.

Due to this position, the constructional height of the device according to the invention is small.

The stop device 6 consists essentially of a plate-shaped force receiver mounted in a laterally movable manner on the base plate 12 of the device;
The first stop part has a stop part @8 and a second stop member 9.

The flat plate 7 is located between the base plate 12 and the articulating arm 5, and therefore:
Due to the torque acting on the plate l during honing, it is located in the flow of force that extends from the plate l through the flat plate 7 and onto the base plate 12. The stop device 6 includes a flat plate 7.
To prevent twisting of the holding parts 10.13 and 11.1
4 is attached. This holding part has a stop part @10 and l
lf! : a second pair of stops 13.1 with two opposing stops 13.1 fixed to the base plate and formed as a pedestal;
It consists of 4.

The stops @8 to 11 are each made of the same roller. Between the first pair of stops 8 and 9, a connecting arm 5 is provided.
It is movably guided in a radial direction relative to the axis of the workpiece. In this case, the rollers 8 and 9 are arranged so that the articulated arm 5 can hold the workpiece with its outer end opposite to the side of plate I.
It is arranged so that it is supported by the roller 8 located at the front in the processing direction (arrow 16) 4C during processing. Due to the resulting reaction force, German Patent Publication No. 29036
Whereas in the known solution described in JP-A-22, the workpiece holder would be displaced or tilted, in the device according to the invention this reaction force is absorbed by the second roller 9 of the stop pair described above.
Uke is accepted by. The roller 9 has a distance from the plate 1 to the roller 8, and is in contact with the connecting arm 5 on the side opposite to the roller 8 side. As a result, the torque acting on the connecting arm 5 during machining is always absorbed by the couple of rollers 8 and 9 (arrow 17, 18) and transmitted to the flat 1i7. The spacing between the rollers 9 and the workpiece support plate l is selected to be small, while the mutual spacing between the rollers 8 and 9 is as large as possible, in particular equal to the spacing between the rollers 10 and 11. A large leverage and a correspondingly small stopping force are thus guaranteed.

The flat plate 7, which is attached to the base plate 12 in a movable state by the three rolling balls 22 held in the cage 21, is fixed onto the base plate 12 via the second stoppers *10, 11. (force direction arrow 19.20), the rollers are supported between the first pair of stops 8.9 and the second pair of stops 10° 11. They are arranged so that the stopping directions are offset from each other by a right angle. Thereby, the plate 7 is mounted movably transversely to the direction of movement of the articulated arm 5, so that the workpiece holder is mounted on the plate l
Unrestrained floating movement in all directions is guaranteed.

In FIG.
It is formed by a commercially available rolling bearing 25 which is rotatably mounted on a journal 26 which is rigidly inserted into the.

In order to adjust the lever guide between the two rollers 8 and 9 without any play, a further proposal of the invention uses two stopper blocks 13° 1417).
One, for example the stop 14, is configured to be adjustable with an adjusting screw 23 and a lock nut 24.

Although different from the embodiment described above, some workpiece supports are arranged in which the plates are arranged one above the other in a manner known per se, and a plurality of workpieces are machined simultaneously by one common honing tool, in which case It is particularly advantageous if each workpiece holder is associated with a separate stop device 6 and holding device on the plate.

Furthermore, in addition to the embodiments shown in FIGS. 1 and 2, which illustrate right-handed machining (arrow 15), counterclockwise machining is also possible with K if an appropriate mirror image device is used.

Also, according to another configuration of the invention, two pairs of rollers are added which are arranged in mirror image with respect to the illustrated pair of stops (8, 9 and lo, 11) and which receive opposite couples. Then,
Machining can be carried out while changing the direction of rotation, which is very advantageous for special applications.

It is also possible to use other equivalent components in place of the components mentioned above, for example
Instead of 1, suitably designed sliders can be provided.

In order to save weight and space, the flat plate 7 is chamfered at its oblique part or the chamfered corners 27 and 18 and the shoulders 29 and 30 formed on the shoulder #2 are formed on the shoulders 29 and 30, while the other parts are They are located diagonally with respect to the plate, which is formed into a substantially rectangular shape. Stopper 1 in the range of shoulders 29 and 30
3 and 14 are arranged, in which case the stop 13.14 rests on the shoulder surface 31 of the flat plate 7, which extends at right angles to the longitudinal axis A of the articulated arm 5.
Or 32 extends over the entire length. Other shoulder surface 33
and 34 each extend at an angle somewhat less than 45 DEG 1 to said longitudinal axis A. In addition, while corresponding to surfaces 33 and 34, the distance between rollers 8 and lO or between rollers 9 and 11, between rollers 10 and connecting arm 5, or between rollers 11 and connecting arm 5 spans the entire distance. The end faces of the extending corners 27 and 28 also have a corresponding but opposite slope to the shoulder faces.

Corners 27.28.29.3 diagonally opposite each other
0 is formed with mirror image symmetry.

[Brief explanation of the drawing]

1 is a schematic plan view of the device according to the invention; FIG.
1 is a cross-sectional view taken along line 1-1 in the figure; FIG. l... Workpiece support part 5... Connecting arm 6... Stopping part @ 7... Force receiving part 8.9... Stopping member 10, 13; 11.14... Hemorrhoid protection part 23-...Adjustment screw 34...Rock Knight - 321-

Claims (1)

[Claims] (11) When boring a workpiece such as a gear with a tool, in particular with a honing tool, at least one workpiece is in a floating state laterally with respect to the tool axis on the base plate. In a workpiece holding device held on a workpiece support mounted and protected against torsion by a stop device, the stop device (61) is connected to the base plate (12) and the workpiece support (il The holding part (10, 13; 11.14)
The force receiver, which is arranged in such a way that there is no twisting relative to the workpiece support (71), cooperates with the part (71) as follows:
Forces (17, 18) acting on the stop device (6) from 11
A workpiece holding device characterized in that the holding portions (10, 13; 11, 14) cooperate to receive the support. (21) The device according to claim 1, characterized in that the portion (7) of the force receiver is at least partially in the area outside the workpiece support (1). 3) The stop device is a first stop member such as a stop roller and a second stop member, the workpiece support having a stop such as an arm projecting at least partially between the stop members; In a plate-shaped device, the first and second stop members (91) are connected to the first stop member (91) when the continuous arm (51) is stopped.
Reaction force (18) for repulsion force (17) arising from 8)
t-form, and its repulsive force (17) is the reactive force (1B)
It is assumed that the stop portions 1 (8, 9) are arranged in such a way that they are in the opposite direction and have the same size.
An apparatus according to claim 1 or 2. (4) the force receiver is arranged on the part (7) with the stop members (8, 9) radially relative to the axis of the workpiece and with the greatest possible mutual spacing; 4. A device as claimed in any one of claims 1 to 3, in which the stop members are on each side of the arm. . (5) The second stop member (9) is connected to the workpiece support part (11
and are placed with the smallest possible distance between them,
The device according to claim 2, characterized in that this distance is smaller than the phase-to-phase distance between the locking members (8, 9). (61 stop device (61 each stop member (8, 9) -
In each case, the force receiver is fixed on the part (71).
lo, 13; 11.14), and in particular a
A holding part (10e 13; 11*14) attached to the stopper member (8) or the second stopper member (9) when viewed from the axial direction of the continuous arm (5) to the stopper member (10i x 11). The device according to any one of claims 1 to 5, characterized in that the device is located in front or behind the stop 4 member (8 or 10). 10, 13; 11114) (D- stop members (10 and 11) 75 each on different sides and characterized in that they are located at a distance from the continuous arm (5), in particular at equal distances Claim 1
The device according to any one of Items 6 to 6. (8) Holding part (10, 13; 11.14) (7) Stop part 1 (10 to 11) J Transversely to the axis of the continuous arm (5), especially in the perpendicular k direction - in the same line 1. A device according to any one of claims 1 to 7, characterized in that it is located at a Te (9) Holding part (10, 13; 11.14L (7
) At least one stop? The opposite stop parts (u3.14) are attached to the members (10, 11). In particular, both stop members (10 and 11) are mainly attached to the base plate (1).
2) Attached opposing stop part (1) fixed to the soil
3, 14) are supported in mutually parallel directions, at least one of which has an opposing stop, in particular an adjustment screw (
9. Device according to any one of claims 1 to 8, characterized in that the counterstops with locking latches 23) and 24) are adjustable. (10) Holding parts (10,
The stop members 13; 11, 14), in particular the stop members (10 and 11) formed without rollers, are the stop members (10 and 11) of the stop device (6).
Any one of claims 1 to 9, characterized in that it is supported by opposing stop portions (13, 14) in a direction perpendicular to the stop members (8 and '9). The device described in. (11) The third and fourth pairs of stop members are connected to the stop device (6
) and the stopper member (
8, 9 and 10.11), and that the stopper pair (8, 9 and 10.11) is provided in a mirror image positional relationship.
0.11) The device according to any one of claims 1 to 1θ, characterized in that it is configured to receive an opposite force of the same magnitude as 0.11). . (12) The force receiver is the part (71) and the corner (27, 28, 29
, ao) is chamfered and/or formed into a scrap shape.
7°28 and 29.30) are formed symmetrically.
3It.